Research on Energy Efficiency of DC Distribution System

The concept of DC power distribution has gained interest within the research community in the past years; especially due to rapid prevalence of solar PVs as a tool for distributed generation in DC microgrids. Various efficiency analyses have been presented for the DC distribution paradigm, in comparison to the AC counterpart, considering a variety of scenarios. However, even after a number of such comparative efficiency studies, there seems to be a disparity in the results of research efforts - wherein a definite verdict is still unavailable: 'Is DC distribution a more efficient choice as compared to the conventional AC system?' A final verdict is absent primarily due to conflicting results. In this regard, system modeling and the assumptions made in different studies play a significant role in affecting the results of the study. The current paper is an attempt to critically observe the modeling and assumptions used in the efficiency studies related to the DC distribution system. Several research efforts will be analyzed for their approach towards the system upon which they have performed efficiency studies. Subsequently, the paper aims to propose a model that may alleviate the shortcomings in earlier research efforts and be able to give a definite verdict regarding the comparative efficiency of DC and AC networks for residential power distribution.

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“…The model presented in [12] considers selective office loads. The load division among AC and DC is also arbitrary; quite similar to [1] and [5].…”

Section: Figurementioning

confidence: 99%

AC vs DC Distribution Efficiency: Are we on the Right Path?

Gelani

Dastgeer

Nasir³

et al. 2021

Preprint

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“…The potential electricity savings from DC distribution systems in buildings have been addressed in numerous studies (AlLee and Tschudi 2012; Backhaus et al 2015;Savage, Nordhaus, and Jamieson 2010;Denkenberger et al 2012;Sannino, Postiglione, and Bollen 2003;Thomas, Azevedo, and Morgan 2012;Garbesi, Vossos, and Shen 2011;Engelen et al 2006;Glasgo 2017;Hammerstrom 2007;Liu and Li 2014;Noritake et al 2015Noritake et al , 2014Paajanen, Kaipia, and Partanen 2009;Starke, Tolbert, and Ozpineci 2008;Willems and Aerts 2014;Gerber et al 2018;Gerber et al 2017;Frank and Rebennack 2015;Weiss, Ott, and Boeke 2015;Boeke and Wendt 2015;Fregosi et al 2015). For the commercial building sector, the reported savings vary widely from 2 percent (Backhaus et al 2015) to as much as 19 percent (Savage, Nordhaus, and Jamieson 2010).…”

Section: Background and Motivationmentioning

confidence: 99%

Efficient and Zero Net Energy-Ready Plug Loads

Meier

Brown

Gerber

et al. 2019

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This report was prepared as the result of work sponsored by the California Energy Commission. It does not necessarily represent the views of the Energy Commission, its employees or the State of California. The Energy Commission, the State of California, its employees, contractors and subcontractors make no warranty, express or implied, and assume no legal liability for the information in this report; nor does any party represent that the uses of this information will not infringe upon privately owned rights. This report has not been approved or disapproved by the California Energy Commission nor has the California Energy Commission passed upon the accuracy or adequacy of the information in this report.

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“…The authors of [64] give comparative results of system efficiency for DC and AC power. Their analysis for office building indicates an efficiency gain of 14.9% when supplied by DC power as compared to AC power.…”

Section: Present -Post-2012mentioning

confidence: 99%

Enhancing the Energy/Power Efficiency of a DC Distribution Grid for Residential Buildings via Modular Architecture of DC/DC Solid State Transformers

Dastgeer¹,

Gelani²,

Faisal³

et al. 2018

Adv. sci. technol. eng. syst. j.

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DC power is apparently attempting to breach into the power system-the system which it once lost to the AC power paradigm. DC is already present in the generation, transmission and utilization sides of the system, leaving distribution as the only area where it has not shown any significant presencethis may be regarded as still in research phase. The current work aims to investigate efficiency enhancement of a DC power distribution system for residential buildings via the use of a modular approach for the DC/DC solid state transformers (SSTs). Specifically, DC distribution system shows reduced efficiency at light loads because of the lowering in efficiency of its constituent SSTs. Via the use of modular approach, a single SST is composed of smaller modules which may be turned on or off individually, for the purpose of improving the converter efficiency. In this paper, we utilize two methods of load division upon SST converter modules. As the efficiency of an SST is increased, the overall efficiency of the system increases because bulk power passes through these transformers.

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Research on Energy Efficiency of DC Distribution System

Cited by 30 publications

References 9 publications

AC vs DC Distribution Efficiency: Are we on the Right Path?

AC vs DC Distribution Efficiency: Are we on the Right Path?

Efficient and Zero Net Energy-Ready Plug Loads

Enhancing the Energy/Power Efficiency of a DC Distribution Grid for Residential Buildings via Modular Architecture of DC/DC Solid State Transformers

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